PEARLAND, Texas (AP) A Pearland woman has been arrested in the drowning deaths of her 15-month-old twin daughters.

The Pearland Police Department announced that a 21-year-old woman was arrested Sunday on two counts of manslaughter. Authorities say the suspect found her daughters unresponsive in the bathtub of their home on Feb. 17 and called police.

The twins were taken to Memorial Hermann Hospital, and one died later that day. The other died Feb. 22 after being taken off life support. The Harris County Medical Examiner ruled the deaths were homicides.

The woman's 3-year-old son was taken by Child Protective Services shortly after the incident, and placed with relatives. She's being held at the Brazoria County Sheriff's Office Detention Center in lieu of $100,000 bond.